Capone has two henchmen, a heavy-set rat named Arnold Mouseaneggar (a take on Arnold Schwarzenegger) and a lizard named Sugar Ray Lizard (a take on Sugar Ray Leonard). Like Fat Cat's henchmen, Arnold and Sugar Ray are portrayed as not very intelligent.

In his first appearance in the episode "Mind Your Cheese and Q's," Capone has engineered the theft of all the city's milk, cornering the market on cheese production. Any mouse wanting cheese is thus forced to pay his extortion prices, or work for him as slave labor. In his second appearance in "The S.S. Drainpipe," the last episode of season two, Capone is again using slave labor, this time to build for himself an elaborate palace in the sewer. In both instances, but especially in "The S.S. Drainpipe," Capone has shown an attraction to Gadget Hackwrench (calling her his "mall," a play on "gun moll"), a vulnerability which the Rescue Rangers exploit.

A character similar to Capone appeared in "Double O'Chipmunk" as the leader of the rodent henchmen of that episode's main villain. It is debatable whether that character and Capone are one and the same.